setregid04.c revision c6d09b660be500183f6970f2554693f93245e266 
1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
21 * NAME
22 * 	setregid04.c
23 *
24 * DESCRIPTION
25 * 	Test setregid() when executed by root.
26 *
27 * ALGORITHM
28 *
29 *	Setup:
30 *	  Setup signal handling
31 *	  Get user information.
32 *	  Pause for SIGUSER1 if option specified.
33 *	Setup test values.
34 *	Loop if the proper options are given.
35 *	For each test set execute the system call
36 *	  Check return code, if system call failed (return=-1)
37 *		Log the errno and Issue a FAIL message.
38 *	  Otherwise,
39 *		Verify the Functionality of system call
40 *		if successful,
41 *			Issue Functionality-Pass message.
42 *		Otherwise,
43 *			Issue Functionality-Fail message.
44 *	Cleanup:
45 *	  Print errno log and/or timing stats if options given.
46 *
47 * USAGE:  <for command-line>
48 *	setregid04 [-c n] [-e] [-f] [-i n] [-I x] [-P x] [-t]
49 *	where,  -c n : Run n copies concurrently.
50 *		-e   : Turn on errno logging.
51 *		-f   : Turn off functionality Testing.
52 *		-i n : Execute test n times.
53 *		-I x : Execute test for x seconds.
54 *		-P x : Pause for x seconds between iterations.
55 *		-t   : Turn on syscall timing.
56 * History
57 *	07/2001 John George
58 *		-Ported
59 *
60 * Restrictions
61 * 	This test must be ran as root.
62 */
63
64
65#include <pwd.h>
66#include <grp.h>
67#include <malloc.h>
68#include <string.h>
69#include <test.h>
70#include <usctest.h>
71#include <errno.h>
72
73extern int Tst_count;
74
75char *TCID = "setregid04";
76gid_t users_gr_gid, root_gr_gid, daemon_gr_gid, bin_gr_gid;
77int neg_one = -1;
78int exp_enos[]={0};
79
80struct group users, daemongr, root, bin;
81
82/*
83 * The following structure contains all test data.  Each structure in the array
84 * is used for a separate test.  The tests are executed in the for loop below.
85 */
86
87struct test_data_t {
88	gid_t*	real_gid;
89	gid_t*	eff_gid;
90	struct group* exp_real_usr;
91	struct group* exp_eff_usr;
92	char *	test_msg;
93} test_data[] = {
94	{ &root_gr_gid, &root_gr_gid, &root, &root, "After setregid(root, root)," },
95	{ &users_gr_gid, &neg_one, &users, &root, "After setregid(users, -1)" },
96	{ &root_gr_gid, &neg_one, &root, &root, "After setregid(root,-1)," },
97	{ &neg_one, &neg_one, &root, &root, "After setregid(-1, -1)," },
98	{ &neg_one, &root_gr_gid, &root, &root, "After setregid(-1, root)" },
99	{ &root_gr_gid, &neg_one,  &root, &root, "After setregid(root, -1)," },
100	{ &daemon_gr_gid, &users_gr_gid, &daemongr, &users, "After setregid(daemongr, users)" },
101	{ &neg_one, &neg_one, &daemongr, &users, "After setregid(-1, -1)" },
102	{ &neg_one, &users_gr_gid, &daemongr, &users, "After setregid(-1, users)" },
103};
104
105int TST_TOTAL = sizeof(test_data)/sizeof(test_data[0]);
106
107void setup(void);			/* Setup function for the test */
108void cleanup(void);			/* Cleanup function for the test */
109void gid_verify(struct group *ru, struct group *eu, char *when);
110
111main(int ac, char **av)
112{
113	int lc;				/* loop counter */
114	char *msg;			/* message returned from parse_opts */
115
116	/* parse standard options */
117	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) !=
118	    (char *)NULL) {
119		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
120		tst_exit();
121		/*NOTREACHED*/
122	}
123
124	/* Perform global setup for test */
125	setup();
126
127	/* check looping state if -i option is given */
128	for (lc = 0; TEST_LOOPING(lc); lc++) {
129		int i;
130
131		/* reset Tst_count in case we are looping */
132		Tst_count = 0;
133
134		for (i = 0; i < TST_TOTAL; i++) {
135			/* Set the real or effective group id */
136			TEST(setregid(*test_data[i].real_gid,
137				*test_data[i].eff_gid));
138
139			if (TEST_RETURN == -1) {
140				TEST_ERROR_LOG(TEST_ERRNO);
141				tst_resm(TBROK, "setregid(%d, %d) failed",
142					test_data[i].real_gid,
143					test_data[i].eff_gid);
144			} else {
145				/*
146				 * Perform functional verification if test
147				 * executed without (-f) option.
148				 */
149				if (STD_FUNCTIONAL_TEST) {
150					gid_verify(test_data[i].exp_real_usr,
151						test_data[i].exp_eff_usr,
152						test_data[i].test_msg);
153				} else {
154					tst_resm(TPASS, "Call succeeded.");
155				}
156			}
157		}
158	}
159	cleanup();
160	/*NOTREACHED*/
161}
162
163/*
164 * setup()
165 *	performs all ONE TIME setup for this test
166 */
167void
168setup(void)
169{
170	/* capture signals */
171	tst_sig(FORK, DEF_HANDLER, cleanup);
172
173 	/* Check that the test process id is super/root  */
174	if (geteuid() != 0) {
175		tst_brkm(TBROK, NULL, "Must be root for this test!");
176		tst_exit();
177	}
178
179	/* set the expected errnos... */
180	TEST_EXP_ENOS(exp_enos);
181
182	root = *(getgrnam("root"));
183	root_gr_gid = root.gr_gid;
184
185	users = *( getgrnam("users"));
186	users_gr_gid = users.gr_gid;
187
188	daemongr = *(getgrnam("daemon"));
189	daemon_gr_gid = daemongr.gr_gid;
190
191	bin = *(getgrnam("bin"));
192	bin_gr_gid = bin.gr_gid;
193
194	/* Pause if that option was specified
195	 * TEST_PAUSE contains the code to fork the test with the -c option.
196	 */
197	TEST_PAUSE;
198}
199
200/*
201 * cleanup()
202 *	performs all ONE TIME cleanup for this test at
203 *	completion or premature exit
204 */
205void
206cleanup(void)
207{
208	/*
209	 * print timing stats if that option was specified.
210	 * print errno log if that option was specified.
211	 */
212	TEST_CLEANUP;
213
214	/* exit with return code appropriate for results */
215	tst_exit();
216	/*NOTREACHED*/
217}
218
219void
220gid_verify(struct group *rg, struct group *eg, char *when)
221{
222	if ((getgid() != rg->gr_gid) || (getegid() != eg->gr_gid)) {
223		tst_resm(TFAIL, "ERROR: %s real gid = %d; effective gid = %d",
224			 when, getgid(), getegid());
225		tst_resm(TINFO, "Expected: real gid = %d; effective gid = %d",
226			 rg->gr_gid, eg->gr_gid);
227	} else {
228		tst_resm(TPASS, "real or effective gid was modified as "
229			"expected");
230	}
231}
232
233